Abnormal forms of acritarchs (phytoplankton) in the upper Hirnantian (Upper Ordovician) of Anticosti Island, Canada

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autorinnen und Autoren: Delabroye A, Munnecke A, Servais T, Vandenbroucke TR, Vecoli M
Zeitschrift: Review of Palaeobotany and Palynology
Jahr der Veröffentlichung: 2012
Band: 173
Seitenbereich: 46-56
ISSN: 0034-6667
Sprache: Englisch


Abstract


A detailed study of Late Ordovician-early Silurian acritarchs (Palaeozoic phytoplankton) from Anticosti Island (Québec, Canada) revealed an unusually high abundance of abnormal forms from the upper Hirnantian carbonate strata (uppermost Ordovician) of the Ellis Bay Formation in the western part of the island (member 6, . Spinachitina taugourdeaui chitinozoan Biozone). The objective of this paper is to describe these abnormal forms in detail. Two species are particularly affected: . Disparifusa psakadoria Loeblich and Tappan, 1978 presents abnormally hypertrophied central vesicles, whereas . Peteinosphaeridium laframboisepointense nov. sp. has appendices that are fused along their length. The abnormal forms of acritarchs occur in rocks deposited during periods that are near time-equivalents to those of maximum ice-sheet extensions on Gondwana during the Hirnantian glaciation. Although this stratigraphic level corresponds to an interval of strong perturbations of the global carbon cycle, the exact factors causing the observed malformations remain unknown. © 2011 .


FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Munnecke, Axel Prof. Dr.
Professur für Paläontologie (Schwerpunkt Faziesanalyse)


Einrichtungen weiterer Autorinnen und Autoren

LILLE 1 University - Science and Technology
Universiteit Gent (UGent) / Ghent University


Forschungsbereiche

Klima und Ressourcen
Forschungsschwerpunkt einer Fakultät: Naturwissenschaftliche Fakultät


Zitierweisen

APA:
Delabroye, A., Munnecke, A., Servais, T., Vandenbroucke, T.R., & Vecoli, M. (2012). Abnormal forms of acritarchs (phytoplankton) in the upper Hirnantian (Upper Ordovician) of Anticosti Island, Canada. Review of Palaeobotany and Palynology, 173, 46-56. https://dx.doi.org/10.1016/j.revpalbo.2011.10.010

MLA:
Delabroye, Aurélien, et al. "Abnormal forms of acritarchs (phytoplankton) in the upper Hirnantian (Upper Ordovician) of Anticosti Island, Canada." Review of Palaeobotany and Palynology 173 (2012): 46-56.

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